Earth2014 preview: Hydrogen SUV ready to hit the road Hyundai's Tucson Fuel Cell can drive for almost 500 kilometres on a single tank of hydrogen – and may be safer than an ordinary, gasoline-powered car ¿ìè¶ÌÊÓÆµ
Drawing on a moon brings out people's best and worst A collaborative art website launched by artists Ai Weiwei and Olafur Eliasson lets people draw on the surface of a moon-like orb – with surprising results CultureLab